CN109183805B - Prefabricated foundation pit bracing system and construction method thereof - Google Patents
Prefabricated foundation pit bracing system and construction method thereof Download PDFInfo
- Publication number
- CN109183805B CN109183805B CN201811004049.9A CN201811004049A CN109183805B CN 109183805 B CN109183805 B CN 109183805B CN 201811004049 A CN201811004049 A CN 201811004049A CN 109183805 B CN109183805 B CN 109183805B
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 62
- 239000002689 soil Substances 0.000 claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 claims description 50
- 239000010959 steel Substances 0.000 claims description 50
- 239000004567 concrete Substances 0.000 claims description 26
- 239000011150 reinforced concrete Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Retaining Walls (AREA)
Abstract
The invention discloses a prefabricated foundation pit support system, which comprises a soil retaining structure and a supporting structure, wherein the soil retaining structure is arranged at two sides of a foundation pit and used for bearing transverse load of the foundation pit, and the supporting structure is used for balancing the transverse load borne by the soil retaining structure; the soil retaining structure comprises a plurality of prefabricated metal components, connecting ports are formed in two sides of each prefabricated metal component, and adjacent prefabricated metal components are connected through mortise and tenon structures to form a continuous wall; the support structure comprises a plurality of prefabricated support members, connecting parts are arranged at two ends of each prefabricated support member, sliding grooves for the connecting parts to slide up and down are formed in the prefabricated metal members, and fixing pieces are arranged between the connecting parts and the sliding grooves. The invention also discloses a construction method of the prefabricated foundation pit bracing system. The invention has the advantages of high design strength, convenient erection, stable construction quality, high efficiency, saving of construction period and environmental protection.
Description
Technical Field
The invention belongs to the technical field of foundation pit support structures, and particularly relates to a prefabricated foundation pit support system and a construction method thereof.
Background
The foundation pit support structure mainly comprises a soil retaining structure and a supporting structure. The soil retaining structure bears lateral water pressure and soil pressure generated by excavation unloading of the foundation pit, and transmits the pressure to the supporting system, and the foundation pit support structure is a construction temporary soil retaining structure system for stabilizing the foundation pit. Common forms of soil retaining structures are cement soil walls, steel sheet piles, row pile retaining walls, underground continuous walls and the like, and supporting structures are mainly steel supports, concrete supports and the like. The cement soil wall and the steel sheet pile are mainly applicable to shallow foundation pits with excavation depth of about 6m or less, and have limited application range. Therefore, for deep foundation pit engineering, the pile-row retaining wall and the underground diaphragm wall are mainly used.
The construction process of the row pile enclosure structure and the underground continuous wall enclosure structure comprises the steps of firstly forming a groove on the ground, then placing a reinforcement cage processed on the ground into the groove section, pouring underwater concrete by adopting a guide pipe, completing the wall section (or pile) of one unit, and then constructing subsequent wall sections (or piles) in sequence. The row pile enclosure structure can be added with water stopping measures among piles, and the underground continuous wall structure can form a continuous reinforced concrete wall by itself due to the fact that the wall sections are connected with each other by utilizing specific joints, so that soil retaining and water stopping functions can be achieved. However, the underground diaphragm wall structure has better integrity and has better functions of water interception, seepage prevention, bearing, water blocking and the like.
After the soil retaining structure is completed, the soil retaining structure begins to excavate downwards from the ground, after the soil retaining structure is excavated to the designed elevation, the inner supporting structure is needed to be firstly constructed, after the inner supporting structure is completed, the soil retaining structure can continue to excavate downwards, if a plurality of inner supporting structures exist, after the soil retaining structure is excavated to the corresponding supporting elevation, the supporting structure is firstly erected, and then the soil retaining structure is excavated until the soil retaining structure is excavated to the substrate elevation. It has the following problems:
1. the binding construction process of the reinforcement cage of the retaining structure and the concrete inner support structure is complex, long in time consumption, high in labor cost and unstable in construction quality;
2. after the concrete inner supporting structure is erected, the next layer of soil body is excavated after the cast-in-place concrete support reaches the design strength, and the process consumes longer time;
3. although the steel support can reach the design strength after being erected, the steel support is inferior to a concrete support, and many times the steel support does not meet the strength design requirement;
4. the main structure is constructed in a reverse stage, the inner supporting structure is required to be sequentially removed from bottom to top, the process is time-consuming and labor-consuming, and after the supporting is removed, the control working condition that the soil retaining structure and the supporting structure are stressed greatly can occur.
Disclosure of Invention
In order to overcome the technical defects, the first object of the invention is to provide a prefabricated foundation pit bracing system, which has the advantages of high design strength, convenient erection, stable construction quality, great shortening of construction period, high efficiency, saving and environmental protection by adopting prefabricated metal components and prefabricated supporting components.
In order to solve the problems, the invention is realized according to the following technical scheme:
a prefabricated foundation pit bracing system comprises a soil retaining structure and a supporting structure, wherein the soil retaining structure is arranged on two sides of a foundation pit and used for bearing transverse loads of the foundation pit, and the supporting structure is used for balancing the transverse loads borne by the soil retaining structure;
the soil retaining structure comprises a plurality of prefabricated metal components, connecting ports are formed in two sides of each prefabricated metal component, and the adjacent prefabricated metal components are connected with each other to form a continuous wall body;
the support structure comprises a plurality of prefabricated support members, connecting portions are arranged at two ends of each prefabricated support member, sliding grooves for the connecting portions to slide up and down are formed in the prefabricated metal members, and fixing pieces are arranged between the connecting portions and the sliding grooves.
Further, the prefabricated metal component is of a steel plate structure with a rectangular cross section, and a plurality of sliding grooves which are arranged in parallel are vertically formed in one side of the prefabricated metal component, which faces the foundation pit; the bottom embedding of prefabricated metal part sets up the bottom of foundation ditch.
Further, one side of the prefabricated metal component is provided with a mortise and tenon, and the other side of the prefabricated metal component is provided with a tenon, and adjacent prefabricated metal components are connected through a mortise and tenon structure to form the continuous wall.
Further, the fixing piece comprises a bolt and a bolt sleeve, and the bolt sleeve is preset in the prefabricated metal component; the sliding groove is provided with a plurality of first connecting holes, the connecting portion is provided with second connecting holes corresponding to the first connecting holes, and bolts sequentially penetrate through the second connecting holes and the first connecting holes to enter the bolt sleeve to be fixed.
Further, the prefabricated support member is a profiled steel concrete support member, and a plurality of profiled steel concrete support members are arranged on the sliding groove in parallel.
Further, the prefabricated support member comprises a support middle part, the support middle part comprises a core steel part and concrete poured around the core steel part, and the connecting parts are arranged at two ends of the core steel part.
Further, the connecting part comprises a fixed steel plate and a profile steel framework; the fixed steel plate is connected with the middle part of the support through the profile steel framework.
Further, the middle part of the support is a concrete structure with a rectangular section, and a plurality of reinforcing steel bars are buried around the concrete.
In order to overcome the technical defects, the second object of the invention is to provide a construction method of a prefabricated foundation pit bracing system, which is simple and quick to operate and short in construction time.
In order to solve the problems, the invention is realized according to the following technical scheme:
the construction method of the prefabricated foundation pit bracing system comprises the following steps:
s1, constructing a placing groove for placing the prefabricated metal component, wherein the placing groove is subjected to slurry pouring after excavation so as to form a slurry retaining wall, or the placing groove is not excavated, stirring and reinforcing of soil are directly carried out in a mode of applying stirring piles, and the prefabricated metal component is inserted before initial setting of the reinforced soil;
s2, hanging the prefabricated metal parts into the placing grooves, performing concrete pouring in the placing grooves, then excavating adjacent placing grooves, lowering the adjacent prefabricated metal parts, connecting the adjacent prefabricated metal parts through the connecting ports, performing concrete pouring in the adjacent placing grooves, and performing successive construction to form the continuous wall;
s3, excavating soil in the foundation pit to the elevation of the first supporting structure, sliding the connecting part of the prefabricated supporting component into the elevation of the first supporting structure from top to bottom along the sliding groove, and fixing the connecting part by the fixing piece;
s4, continuing to excavate the soil body in the foundation pit to the elevation of the second supporting structure, sliding the prefabricated supporting component on the elevation of the first supporting structure to the position of the elevation of the second supporting structure, fixing the prefabricated supporting component through the fixing piece, and then sliding the prefabricated supporting component on the sliding groove to the position of the elevation of the first supporting structure again, and fixing the prefabricated supporting component through the fixing piece;
s5, repeating the step S3 and the step S4, sequentially constructing the prefabricated support members on the elevation of each support structure from top to bottom, and then continuously excavating the soil body in the foundation pit to the elevation of the substrate;
s6, constructing a main body structure bottom plate, sequentially constructing a main body structure from bottom to top, and gradually jacking up the prefabricated support member along with the layer-by-layer construction of the main body structure until the construction of the main body structure is completed.
Further, the prefabricated support member is lifted or lowered by a jack, and the jack is disposed above and below the connection portion.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention provides a prefabricated foundation pit support system, which comprises a soil retaining structure and a supporting structure, wherein the soil retaining structure is arranged at two sides of a foundation pit and used for bearing transverse load of the foundation pit, and the supporting structure is used for balancing the transverse load borne by the soil retaining structure; the soil retaining structure is formed by adopting a plurality of prefabricated metal components, the soil retaining structure can be prefabricated and processed in sections in a factory, welding on a construction site is reduced, and the defects of complex construction flow, long time consumption, high labor cost, unstable construction quality and the like of the reinforcement cage of the traditional underground continuous wall can be effectively solved; the prefabricated support members are adopted to form a support structure, so that the support structure has the characteristics of higher bearing capacity and support-following use; through set up sliding tray, mounting on prefabricated metal parts to make prefabricated support component can be at the random height-adjusting in the sliding tray, and demolish conveniently, but reuse. The prefabricated foundation pit bracing system is high in design strength, convenient to erect, stable in construction quality, capable of greatly shortening the construction period, efficient, saving and environment-friendly.
(2) The construction method of the prefabricated foundation pit bracing system is simple and quick in operation and short in construction time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a preferred construction of a prefabricated foundation pit bracing system according to the present invention;
FIG. 2 is a schematic view of a prefabricated metal part according to the present invention;
FIG. 3 is a top view of a preformed metal component according to the present invention;
FIG. 4 is a schematic view of the structure of the prefabricated support unit according to the present invention;
FIG. 5 is a cross-sectional view of the connection portion of the present invention;
fig. 6 is a cross-sectional view of the middle portion of the support of the present invention.
Marking:
1. a soil retaining structure; 11. prefabricating a metal component; 111. a sliding groove; 1111. a first connection hole; 112. a bolt sleeve; 113. a tenon; 114. mortise opening; 2. a support structure; 21. prefabricating a supporting member; 211. a connection part; 2111. a second connection hole; 2112 fixing the steel plate; 2113. a section steel skeleton; 212. a support middle part; 2121. a core steel member; 2122. reinforcing steel bars; 2123. concrete; 3. a main body structure base plate; 4. soil mass; 5. and (5) placing a groove.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Example 1
The embodiment discloses a prefabricated foundation pit bracing system, which is shown in figures 1-6, and comprises a soil blocking structure 1 arranged at two sides of a foundation pit and used for bearing transverse load of the foundation pit, and a supporting structure 2 used for balancing the transverse load borne by the soil blocking structure 1;
the soil retaining structure 1 comprises a plurality of prefabricated metal parts 11, wherein connecting ports are formed in two sides of each prefabricated metal part 11, and the adjacent prefabricated metal parts 11 are connected with each other to form a continuous wall body;
the support structure 2 comprises a plurality of prefabricated support members 21, connecting parts 211 are arranged at two ends of the prefabricated support members 21, sliding grooves 111 for the connecting parts 211 to slide up and down are arranged on the prefabricated metal members 11, and fixing pieces are arranged between the connecting parts 211 and the sliding grooves 111.
In the embodiment, the prefabricated metal part 11 is a steel plate structure with a rectangular cross section, and a plurality of sliding grooves 111 which are arranged in parallel with each other are vertically arranged on one side of the prefabricated metal part facing the foundation pit; the bottom end of the prefabricated metal component is embedded and arranged at the bottom of the foundation pit; the prefabricated metal parts 11 adopt a steel plate structure with rectangular cross sections, so that welding on a construction site is reduced, and the construction is simpler, more convenient and quicker.
In this embodiment, the connecting port on one side of the prefabricated metal parts 11 is a mortise 114, the connecting port on the other side is a tenon 113, and adjacent prefabricated metal parts are connected by a mortise-tenon structure to form a continuous wall; the structural design of the connecting port reduces the welding of the prefabricated metal parts 11 on site and saves time more.
In this embodiment, the fixing member includes a bolt and a bolt sleeve 112, a plurality of first connection holes 1111 are provided on the sliding groove 111, a second connection hole 2111 corresponding to the first connection hole 1111 is provided on the connection portion 211, and the bolt sequentially passes through the second connection hole 2111 and the first connection hole 1111 to enter the bolt sleeve 112 for fixing; the structural design of the first connecting hole 1111, the second connecting hole 2111, the bolt and the bolt sleeve 112 is more beneficial to the connection between the prefabricated support member 21 and the prefabricated metal member 11, is convenient for the detachment of the prefabricated support member 21, can be reused for other projects after the detachment, reduces the manufacturing cost, does not generate construction waste, and is environment-friendly.
In this embodiment, the prefabricated support member 21 is a steel reinforced concrete support member, and a plurality of steel reinforced concrete support members are disposed parallel to each other on the sliding groove 111; the structural design of the sliding groove 111 and the steel reinforced concrete supporting member enables the steel reinforced concrete supporting member to move up and down in the vertical direction of the sliding groove 111, and the bearing capacity is high.
In this embodiment, the prefabricated support member 21 includes a support middle 212, the support middle 212 includes a core steel 2121 and concrete 2123 poured around the core steel 2121, and the connection portions 211 are provided at both ends of the core steel 2121; the structural design of the connecting part 211 and the supporting middle part 212 enables the connecting part 211 and the supporting middle part to form a whole, can bear all internal forces of the prefabricated supporting member 21 together, and has the characteristics of higher bearing capacity of the concrete support and the supporting and using of the steel support.
In the present embodiment, the connecting portion 211 includes a fixed steel plate 2112, a section steel skeleton 2113; the fixed steel plate 2112 is connected with the middle support part through a profile steel framework 2113; the fixed steel plate 2112 is welded to the section steel skeleton 2113 integrally, and internal force can be transmitted.
In this embodiment, the middle of the support is a concrete structure with a rectangular cross section, and a plurality of reinforcing steel bars 2122 are buried around the concrete 2123; the reinforcing bars 2122 are designed to increase the load carrying capacity of the support center 212.
Based on the above structural design, the specific steps of the construction method of the prefabricated foundation pit bracing system according to the embodiment are as follows:
s1, constructing a placing groove 5 for placing a prefabricated metal component 11, wherein the placing groove 5 is excavated section by section, and slurry pouring is carried out on the placing groove 5 after excavation so as to form a slurry retaining wall;
s2, hoisting the prefabricated metal parts 11 into the placing grooves 5, performing concrete pouring in the placing grooves 5, then excavating adjacent placing grooves 5, lowering the adjacent prefabricated metal parts 11, connecting the adjacent prefabricated metal parts 11 through connecting ports, performing concrete pouring in the adjacent placing grooves 5, and performing successive construction to form a continuous wall body;
specifically, the prefabricated metal parts 11 are steel plate structures with rectangular cross sections, adjacent prefabricated metal parts 11 are vertically inserted into mortise 114 through tenons 113 to be connected, and then concrete pouring is carried out in the placing groove 5 to form the underground continuous wall with the steel reinforced concrete structure;
s3, excavating a soil body 4 in the foundation pit to the first support structure elevation, sliding the connecting part 211 of the prefabricated support member 21 into the first support structure elevation from top to bottom along the sliding groove 111, and fixing the connecting part by a fixing piece;
specifically, the prefabricated support member 21 is a steel reinforced concrete support member, hydraulic jacks are installed above and below the connection portion 211 of the steel reinforced concrete support member, and the steel reinforced concrete support member can be lifted or lowered by the hydraulic jacks; embedding a bolt sleeve 112 in the prefabricated metal part 11, and enabling bolts to sequentially pass through the second connecting holes 2111 and the first connecting holes 1111 to enter the bolt sleeve 112 for fixing;
s4, continuously excavating soil body 4 in the foundation pit to the elevation of the second supporting structure, sliding the prefabricated supporting member 21 on the elevation of the first supporting structure to the elevation of the second supporting structure, fixing the prefabricated supporting member by a fixing piece, and sliding the prefabricated supporting member 21 on the sliding groove 111 to the elevation of the first supporting structure again, and fixing the prefabricated supporting member by the fixing piece;
s5, repeating the step S3 and the step S4, sequentially constructing prefabricated support members 21 on the elevation of each support structure from top to bottom, and then continuously excavating soil bodies 4 in the foundation pit until the elevation of the substrate is reached;
s6, constructing the main structure bottom plate 3, and sequentially constructing the main structure from bottom to top, wherein the prefabricated support member 21 is gradually jacked up along with the layer-by-layer construction of the main structure until the construction of the main structure is completed.
Example 2
The embodiment discloses a prefabricated foundation pit bracing system, and the structure of the prefabricated foundation pit bracing system is the same as that of embodiment 1.
The construction method of the prefabricated foundation pit bracing system according to the embodiment is different from embodiment 1 in that:
in step S1, the soil is directly stirred and reinforced by applying a stirring pile without digging the placing groove 5, and the prefabricated metal parts 11 are inserted before the initial setting of the reinforced soil.
The rest of the procedure is the same as in example 1.
The present invention is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present invention are within the scope of the technical proposal of the present invention.
Claims (2)
1. A construction method of a prefabricated foundation pit bracing system is characterized by comprising the following steps: the prefabricated foundation pit bracing system comprises a soil retaining structure and a supporting structure, wherein the soil retaining structure is arranged at two sides of a foundation pit and used for bearing transverse load of the foundation pit, and the supporting structure is used for balancing the transverse load borne by the soil retaining structure;
the soil retaining structure comprises a plurality of prefabricated metal components, connecting ports are formed in two sides of each prefabricated metal component, and the adjacent prefabricated metal components are connected with each other to form a continuous wall body;
the prefabricated metal part is of a steel plate structure with a rectangular cross section, and a plurality of sliding grooves which are arranged in parallel are vertically arranged on one side of the prefabricated metal part, which faces the foundation pit; the bottom end of the prefabricated metal component is embedded and arranged at the bottom of the foundation pit;
the connecting ports on one side of the prefabricated metal parts are mortise holes, the connecting ports on the other side of the prefabricated metal parts are tenon heads, and adjacent prefabricated metal parts are connected through mortise and tenon structures to form the continuous wall;
the support structure comprises a plurality of prefabricated support members, connecting parts are arranged at two ends of each prefabricated support member, sliding grooves for the connecting parts to slide up and down are formed in the prefabricated metal members, and fixing pieces are arranged between the connecting parts and the sliding grooves;
the prefabricated support member comprises a support middle part, wherein the support middle part comprises a core steel part and concrete poured around the core steel part, and the connecting parts are arranged at two ends of the core steel part;
the connecting part comprises a fixed steel plate and a profile steel framework; the fixed steel plate is connected with the middle support part through the profile steel framework;
the fixing piece comprises a bolt and a bolt sleeve, and the bolt sleeve is preset in the prefabricated metal component; the sliding groove is provided with a plurality of first connecting holes, the connecting part is provided with second connecting holes corresponding to the first connecting holes, and the bolts sequentially pass through the second connecting holes and the first connecting holes and enter the bolt sleeve to be fixed;
the middle part of the support is a concrete structure with a rectangular section, and a plurality of reinforcing steel bars are buried around the concrete;
the prefabricated supporting member ascends or descends through a jack, and the jack is arranged above and below the connecting part;
the construction method of the prefabricated foundation pit bracing system comprises the following steps:
s1, constructing a placing groove for placing the prefabricated metal component, wherein the placing groove is subjected to slurry pouring after excavation so as to form a slurry retaining wall, or the placing groove is not excavated, stirring and reinforcing of soil are directly carried out in a mode of applying stirring piles, and the prefabricated metal component is inserted before initial setting of the reinforced soil;
s2, hanging the prefabricated metal parts into the placing grooves, performing concrete pouring in the placing grooves, then excavating adjacent placing grooves, lowering the adjacent prefabricated metal parts, connecting the adjacent prefabricated metal parts through the connecting ports, performing concrete pouring in the adjacent placing grooves, and performing successive construction to form the continuous wall;
s3, excavating soil in the foundation pit to the elevation of the first supporting structure, sliding the connecting part of the prefabricated supporting component into the elevation of the first supporting structure from top to bottom along the sliding groove, and fixing the connecting part by the fixing piece;
s4, continuing to excavate the soil body in the foundation pit to the elevation of the second supporting structure, sliding the prefabricated supporting component on the elevation of the first supporting structure to the position of the elevation of the second supporting structure, fixing the prefabricated supporting component through the fixing piece, and then sliding the prefabricated supporting component on the sliding groove to the position of the elevation of the first supporting structure again, and fixing the prefabricated supporting component through the fixing piece;
s5, repeating the step S3 and the step S4, sequentially constructing the prefabricated support members on the elevation of each support structure from top to bottom, and then continuously excavating the soil body in the foundation pit to the elevation of the substrate;
s6, constructing a main body structure bottom plate, sequentially constructing a main body structure from bottom to top, and gradually jacking up the prefabricated support member along with the layer-by-layer construction of the main body structure until the construction of the main body structure is completed.
2. The method of constructing a prefabricated foundation pit bracing system according to claim 1, wherein: the prefabricated support members are steel reinforced concrete support members, and a plurality of steel reinforced concrete support members are arranged on the sliding grooves in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811004049.9A CN109183805B (en) | 2018-08-30 | 2018-08-30 | Prefabricated foundation pit bracing system and construction method thereof |
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| CN201811004049.9A CN109183805B (en) | 2018-08-30 | 2018-08-30 | Prefabricated foundation pit bracing system and construction method thereof |
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| CN109183805A CN109183805A (en) | 2019-01-11 |
| CN109183805B true CN109183805B (en) | 2023-11-24 |
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| CN111206592B (en) * | 2020-01-15 | 2021-04-27 | 天津大学 | Construction method of prefabricated steel-concrete combined support foundation pit supporting structure |
| CN114411760A (en) * | 2022-02-21 | 2022-04-29 | 中国建筑第八工程局有限公司 | Ground wall pre-buried slideway type steel support foundation pit supporting system and construction method thereof |
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| CN209293036U (en) * | 2018-08-30 | 2019-08-23 | 广州地铁设计研究院股份有限公司 | A kind of prefabricated foundation pit enclosure system |
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| CN101418572A (en) * | 2008-10-17 | 2009-04-29 | 上海隧道工程股份有限公司 | Pit construction method employing precast support |
| CN102330430A (en) * | 2011-07-18 | 2012-01-25 | 上海市隧道工程轨道交通设计研究院 | Construction method for prefabricated building enclosure of deep foundation pit in low-temperature environment construction |
| CN202559375U (en) * | 2012-04-12 | 2012-11-28 | 东南大学 | H-shaped steel underground diaphragm wall base pit support structure |
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